Within the past few years, Japan has lost trillions in gross domestic product and experienced a population decline of nearly 1 million. If the country's demographics continue to shift in this way, experts forecast a severe economic downturn and a breakdown in the fabric of social life.

Japan's centenarian population has been rising each year since 1971, when there were just 339 centenarians.

Last year, government data showed that there were more than 65,000 centenarians. This year marks the 47th consecutive year the country of 127 million has broken its own record.

The US still holds the record for the total number of centenarians, but that is primarily because of its larger population. Despite have nearly three times as many people as Japan, the US has a per capita rate of centenarians that's less than half of Japan's. Even in absolute numbers, Japan is only a few thousand people away from having the most centenarians. Demographic trends suggest Japan is bound to claim the top spot sooner rather than later.

The world population is aging, and Pew Research data analyses have predicted that the number of people at least 100 years old — 450,000 as of 2015 — will increase eightfold by 2050, eclipsing 3.6 million.

Japan holds its seniors in high regard. Since 1963, it has recognized September 15 as Respect for the Aged Day. For those who have their 100th birthday in the calendar year, the government on that day awards them a silver-plated sake dish and a letter congratulating them on the achievement.